Extractor Fan WC backdraft flap

[AndyPRK]

Hi

Do they sell cloakroom fans with a backdraft flap built into the fan unit itself ?

Don't want to spend loads of money.

I know that if I fit a traditional setup with external flap, it will make an already cold toilet, freezing.

Thanks

 

[JohnD]

yes

you can also set a separate add-on flap unit that fits into the duct or the back of the (same make or similar) fan

I also recommend the Cowl vent, which has weather protection and a single large flap, and is more durable than the type like a rattly little venetian blind.

https://www.screwfix.com/c/heating-...l_vent&cm_sp=managedredirect-_-hvac-_cowlvent

 

[AndyPRK]

Thanks for the link

I was wanting to put the fan in the ceiling though.


I guess what I need is a 1960's one with a shutter on the front, which I can close when I don't need it


https://www.ebay.co.uk/itm/Bathroom...=2835659684202d46f42370884437ae8c4f407f433f52

 

[JohnD]

the vent goes on the outside of the wall where the duct exits. The flap shuts when the fan is not running, it is pushed open by the air pressure.

here is an example quiet modern fan with its own backdraught flaps. This model also has a run-on timer. It is pretty certain to be much quieter than your old fan.

https://www.tlc-direct.co.uk/Products/SLS100CRZS.html

this cheaper one has no timer but is equally high quality

https://www.tlc-direct.co.uk/Products/SLS100CZ.html

What size is your duct? Do you have steamy showers? Do you have access above to fit a loft-mounted fan to the duct?

here is an add-on shutter. More modern ones have a soft, lightweight flap that opens and closes silently (as fittd to the fans I linked above)

https://www.tlc-direct.co.uk/Products/BG4BS.html

quiet type
https://www.ebay.co.uk/itm/Extracto...hash=item3b214b55b1:m:mGGxh2LMlKUuDlc7KIIpz5w

 

[AndyPRK]

Thanks, John. I think I have found what I want. (or close to)

It's just a toilet, with limited access above.

Even automatic shutters here, but not suitable for me

https://www.ebay.co.uk/itm/Bathroom...489042&hash=item2825a4df60:g:16MAAMXQgoBRilgY

https://www.ebay.co.uk/itm/Manrose-...hash=item3658238a0d:m:mgHavLTg9yV7YJbVw53PBFg

 

[muffking]

Plenty of extractor fans have built in backdraught shutters these days.
If it's a 4" fan you need then try the Envirovent SILENT 100. They also do a timed version SIL100T, which I have at home. It uses a plastic film on the exhaust side which blows out of the way when the fan is on.

https://www.tradingdepot.co.uk/envi...6HQzISbnft98K6TNaOro0GBazk8qyx1xoCr9cQAvD_BwE